Improved apparatus for molding castings



UNITED STATES PATENT Oivirictf.T

P. W. LAMB, OF ALBANY, NEW YORK.

Specification forming part of Letters Patent No. 55,5011, dated June 12, 1866.

To all whom it may concer/n.:

Be it known that I, P. W. LAMB, of Albany, in the county of Albany and State of New York, have invented certain new an d useful Improvelnents in Apparatus for Molding Gastings and I do hereby declare that the following is a full, clear, and exact description of the saine, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a central vertical longitudinal section. Fig. 2 is a plan ortop view with one corner broken away to show the position of a portion of the operating mechanism.

Similar letters of reference indicate corresponding' parts in both figures.

This invention is designed more especially for molding sad-irons, but a portion thereof may also be employed in making molds for other castings.

The invention consists in a novel construction and mode of operating the iiask, whereby the patterns are readily removed from the sand without injuryto the molds, and whereby the handles of the sad-irons are held in proper position during the operation of molding the base or cast-iron portions of the said irons.

To enable others to understand the construc tion and operation of my invention, I will proceed to describe it with reference to the drawings.

A is a shallow quadrangular box, which constitutes the lower portions of the apparatus, and which is furnished with legs a or may be placed on any suitable support. Placed within this box A is a quadrangular frame, B, which has an up-and-down movement inthe box A and has firmly secured upon it a horizontal top plate, b, the ends of which have ears formed upon them which project beyond the ends of the said box, as shown at c c. Situated upon the top plate, b, of the frame Bis the upper part or cope, D, of the lia-sk, which is also rectangular and of the same length and breadth as the box A, and is attached to the plate b by means of downwardly-projectin g lugs d, one at each end, which pass into and through suitable vertical holes formed in the ends c c of the said plate b. Formed in the plate b is any desired number of holes or openings e,

each of which corresponds in size and shape to the under side or surface of the iron to be molded, and projecting upward from the bottom of the box A into each of these openings e is a vertical block, E, the upper surface of which, with the exception of an upwardlyprojecting stud,j', at each end, is iiush with the upper surface of the plate b, when the frame B is in its lowest position, as shown more clearly in Fig. l.

F represents the pattern from which the mold is taken for the base or east-iron portion of the vsad-iron. One of these patterns is placed in each of the openings e in the plate b, and rests upon the block E, which projects into the said opening', the pattern being secured to the block by screws or other suitable means. Formed in the under side et' each pattern are two recesses, h, and extending up from each of these recesses entirely through the pattern is a slot or hole, and in these slots are placed the ends of the wrought-iron handles G, the said ends resting upon the upper ends of the studs f, which project up into the recesses lL, as represented in Fig. l. Formed near the center' of the plat-e c is a vertical circular hole, m, the upper edge of which is surrounded by a rim, a, and in which is placed the vertical main sprue H. Placed around the rim a, and extending therefrom to the patterns F, are smaller horizontal sprues r.

Working in suitable bearings at each side of the box A, and extending transversely underneath the same, are two shafts, l, one near each end of the said box, and fixed upon each end of each shaft I is a cam or eccentric, J. These cams are situated immediately underneath the longitudinal sides of the frame B and work through suitable slots in the bottom of the box A, to act upon the lower edges ofthe said sides of the frame B to elevate or depress the same, as required in using the apparatus. One of these slots is shown at u in Fig. 2. One end ot' each shaft I projects out from one side of the box A, and one shaft has firmly secured upon its ends a lever, K, while upon the end of the other shaft is fixed a crank, L, the crank being connected with the lever by means of a connecting-rod, M, in such manner that a vibratin g motion ofthe lever communicates an equal and corresponding movement to the crank, the said vibrating movement of the lever and crank operating the cams J to elevate and depress the frame B, with the cope D supported thereby, as will be presently more fully explained.

The several parts being in the position hereinbefore set forth, and more clearly shown in Fig. 1, the sand is packed in the cope D in the same manner that other flasks are lled, the sand surrounding the top and sides of the pattern F, together with the wrought-metal handles Gr of the sadirons and the sprues H and r, as indicated in the said gure, whereupon the lever H is pulled back in the direction shown by the arrow in Fig. 2, which turns the shafts I so that the cams J, working through the slots u upon the lower edges of the longitudinal sides of the frame B, as hereinbefore explained, raise the said frame B, together with the cope D and the sand contained therein, into the position shown in red lilies in Fig. 1, the patterns remaining upon the blocks E, so that the molds are lifted clear of the said patternsand, inasmuch as the opposite sides of the cope are raised at exactly thesame time without being tilted or hoisted around, the edges of the molds are prevented from being broken or torn in leaving the pattern, as often occurs when the cope is raised unsteadilyin the usual manner of lifting it up simplyT with the hands. By causing the handles G to rest upon the studs f the holes in the patterns F may be of such size as to permit the ends of the said handles G r to he placed loosely therein, so that they will draw out easily when the cope is raised, as just set forth, and be thus prevented from sticking in the holes and tearing through the sand during such upward movement of the cope. rlhe frame B and copeD being thus raised clear of the patterns, the sprue H is pulled out and the frame'B is removed from the cope by slipping it off from the lugs s, whereupon the cope is placed upon a suitable smooth and lat surface of sand, which completes the mold, the passages formed by the imprint of the sprues H and r and the rim a communicating with the molds formed by the patterns F, and conveying the molten metal thereto in the saine manner as in other asks. The ends of the handles G, projecting downward into the said molds, are surrounded by the metal and firmly secured by the cooling` thereof in the finished casting.

What I' claim as new, and desire to secure by Letters Patent, is-

Vlhe cams J and cam-shafts I, in combination with the box A, frame B, and cope D, Varranged suhstantially as herein set forth, for the purpose specified.

P. W. LAMB.

Witnesses:

FRANCIS H. Woons, Tnonns M. GAFFNEY, MICHAEL A. GnAnoN. 

